OHLECTRIC T53 Low-Pressure Sodium HID Clear Light Bulb | 1800 Kelvin White Color Light with BY22D Base | 55-Watts Energy Efficient Bulb (Pack of 1) OL-50948 - Amazon.com
Lighting-Gallery.net - Low/High Pressure Sodium/Philips Pro SOX 55w
OHLECTRIC T53 Low-Pressure Sodium HID Clear Light Bulb | 1800 Kelvin White Color Light with BY22D Base | 55-Watts Energy Efficient Bulb (Pack of 1) OL-50948 - Amazon.com
Light Efficient Design 35W LED - Replaces 55W HID - 1258 Lumens - B22 Base - Amber - UL Type B